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Date: Thu, 7 Jun 2001 16:56:38 +0200
From: Olaf Hering <olh@suse.de>
To: Andries.Brouwer@cwi.nl
Cc: linux-kernel@vger.kernel.org, alan@lxorguk.ukuu.org.uk
Subject: Re: 2.4.5-ac9 console NULL pointer pointer dereference
Message-ID: <20010607165638.A19959@suse.de>
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In-Reply-To: <UTC200106071436.QAA224593.aeb@vlet.cwi.nl>; from Andries.Brouwer@cwi.nl on Thu, Jun 07, 2001 at 04:36:40PM +0200
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On Thu, Jun 07, Andries.Brouwer@cwi.nl wrote:

>     From: Olaf Hering <olh@suse.de>
> 
>     this happend with 2.4.5-ac9 with serial console on i386.
> 
>     Unable to handle kernel NULL pointer dereference0x02f8 (irq = 3) at virtual address 00000004
>     Oops: 0000
>     >>EIP; c01967c7 <poke_blanked_console+1b/5c>   <=====
> 
> Sounds like this should help:
> 
> --- console.c~  Fri Feb  9 20:30:22 2001
> +++ console.c   Thu Jun  7 16:28:59 2001
> @@ -2684,7 +2684,7 @@
>  void poke_blanked_console(void)
>  {
>         del_timer(&console_timer);      /* Can't use _sync here: called from tasklet */
> -       if (vt_cons[fg_console]->vc_mode == KD_GRAPHICS)
> +       if (!vt_cons[fg_console] || vt_cons[fg_console]->vc_mode == KD_GRAPHICS)
>                 return;
>         if (console_blanked) {
>                 console_timer.function = unblank_screen_t;

That was ok, but:
....
INIT: Id "1" respawning too fast: disabled for 5 minutes
INIT: Id "2" respawning too fast: disabled for 5 minutes
INIT: Id "3" respawning too fast: disabled for 5 minutes
INIT: Id "5" respawning too fast: disabled for 5 minutes
INIT: Id "6" respawning too fast: disabled for 5 minutes
INIT: Id "4" respawning too fast: disabled for 5 minutes


Welcome to SuSE Linux 7.2 (i386) - Kernel 2.4.5-ac9 (ttyS0).
....



Hmm, perhaps a config option...
So, lets try  usb printing now.





Gruss Olaf

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